4020 hydraulic pump leak revisited

Posted by Ted K/MN on September 12, 2004 at 14:30:23 from (205.243.25.136):

A few days ago I posted about my drippy hyd. pump on the '65 4020D. I presumed it was the shaft seal, but some of you said to check at other spots before I remove the pump. Well, I steamed the pump off as best I could, ran it for a while and soon the trickle of fluid came dripping off, but not from anywhere near the shaft seal. It is coming from the top of the pump and running down around the righthand side in the area of the piston plugs. I cannot see up in there well enough to tell exactly where it is originating from. I checked the clamps on the short hose between the top of the pump and cooler, clamps were not really tight, so after tightening them it seemed to slow some, and I ground two batches of feed with it and only a couple of drops showed up. Thought I had it taken care of. Of course just sitting still on the grinder mixer required no hyd. pressure other than to steer it around a bit in the yard. Today I hauled manure with it and a pretty good sized puddle showed on the front axle casting by the time I returned to the yard. So, questions: Is it common for the piston plugs to begin to leak? Wouldn't the oil cooler hose leak even w/o pressure, even when the engine is shut down? Finally, the manual says to remove the pump out the bottom after removing the front axle. Would it be any more hassle to go out the top after removing the radiator/fuel tank? That way, I would be able to get at the connections easier, maybe be able to replace the piston plug seals w/o taking the pump out and not have to work under the thing hoping the supports are adequate. Anybody done it this way? Any advice would be greatly appreciated. Thanks, Ted

Follow Ups:

• Re: 4020 hydraulic pump leak revisited Steph MN 20:10:17 09/13/04 (0)
• Re: 4020 hydraulic pump leak revisited Ted K/MN 06:16:30 09/13/04 (0)
• Re: 4020 hydraulic pump leak revisited Brad B 19:03:42 09/12/04 (1)
  • Re: 4020 hydraulic pump leak revisited msb 19:58:57 09/12/04 (0)

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